1211310401 has 16 divisors (see below), whose sum is σ = 1542936960. Its totient is φ = 925758720.

The previous prime is 1211310391. The next prime is 1211310449. The reversal of 1211310401 is 1040131121.

It is a cyclic number.

It is not a de Polignac number, because 1211310401 - 2¹⁴ = 1211294017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211310901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265610 + ... + 270131.

It is an arithmetic number, because the mean of its divisors is an integer number (96433560).

Almost surely, 2^1211310401 is an apocalyptic number.

It is an amenable number.

1211310401 is a deficient number, since it is larger than the sum of its proper divisors (331626559).

1211310401 is a wasteful number, since it uses less digits than its factorization.

1211310401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535784.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1211310401 is about 34803.8848549986. The cubic root of 1211310401 is about 1065.9867718803.

Adding to 1211310401 its reverse (1040131121), we get a palindrome (2251441522).

The spelling of 1211310401 in words is "one billion, two hundred eleven million, three hundred ten thousand, four hundred one".